<template>
    <el-breadcrumb class="app-breadcrumb" separator="/">
        <transition-group name="breadcrumb">
            <el-breadcrumb-item v-for="(item,index)  in levelList" :key="item.path" v-if="item.meta.title">
                <span v-if="item.redirect==='noredirect'||index==levelList.length-1" class="no-redirect">{{item.meta.title}}</span>
                <router-link v-else :to="item.redirect||item.path">{{item.meta.title}}</router-link>
            </el-breadcrumb-item>
        </transition-group>
    </el-breadcrumb>
</template>
<script>
  export default {
    name: 'breadcrumb',
    created() {
      this.getBreadcrumb()
    },
    data() {
      return {
        levelList: null
      }
    },
    watch: {
      $route() {
        this.getBreadcrumb()
      }
    },
    methods: {
      getBreadcrumb() {
        let matched = this.$route.matched.filter(item => item.name)
        const first = matched[0]
        if (first && first.name !== 'dashboard') {
          matched = [{ path: '/dashboard', meta: { title: '主页' }}].concat(matched)
        }
        this.levelList = matched
      }
    }
  }
</script>
<style rel="stylesheet/scss" lang="scss" scoped>
    .app-breadcrumb.el-breadcrumb {
        display: inline-block;
        font-size: 14px;
        line-height: 50px;
        margin-left: 10px;

        .no-redirect {
            color: #97a8be;
            cursor: text;
        }
    }
</style>
